Coke's PlantBottle, made from up to 30 percent plant-based material, will now be used for Heinz ketchup. Heinz says it will convert all of its 20-ounce bottles in the U.S. this summer.

Heinz explains more about the PlantBottle in the press release:

The plant material is produced through an innovative process that turns natural sugars found in plants into a key component for PET plastic. Currently, PlantBottle™ is made using sugarcane ethanol from Brazil, the only source widely recognized by thought leaders globally for its unique environmental and social performance.

The bottles will feature "talking labels" that ask: "Guess What My Bottle Is Made Of?"

Heinz products packaged in PlantBottles will debut in June, with an expected total of 120 million bottles to be produced with the technology this year—the equivalent of about a fifth of all Heinz bottles sold globally.

The Wall Street Journal reports that Heinz "plans to roll out the packaging globally, part of a broader initiative to cut its greenhouse emissions, solid waste, water consumption and energy usage by at least 20% by 2015."